Design and Preparation of the Cutting Edges of Helical Tapping Drills
If the axial guidance of the tap is not sufficient, the risk of axial miscutting is increasing. When axial miscutting occurs, the tap is running ahead or behind the thread pitch. Axial miscutting is a well-known effect of tapping and can lead to the rejection of parts. Tapping is usually carried out as one of the last steps in the production chain and the functionality of the thread determines the parts‘ usability. An unfunctional thread leads to a rejection of the part and is therefore associated with considerable costs.
Within the scope of the research project, the relationship between the cutting edges’ micro shape, the mechanical load situation of the cutting edges and the tool behaviour during the engagement situation of the helical tapping drills is investigated. A suitable cutting edge preparation method following tool grinding is to be used, so that a targeted adjustment of the cutting edges’ micro shape on tap tools is possible. As a consequence, the production of faulty threads due to axial miscutting is to be avoided.
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Take exit Kreuz Dortmund/Unna to merge onto A44 toward Dortmund, which changes into the B1. Exit Dortmund-Dorstfeld toward Universität (onward see map).
From A 45
Exit Dortmund-Eichlinghofen toward Universität (onward see map).
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From Dortmund central station, take the S1 city train in the direction of Düsseldorf to the "Dortmund Universität" station (7 minutes journey time).
From Bochum central station, take the S1 city train in the direction of Dortmund to the "Dortmund Universität" station (14 minutes journey time).
The city train runs regularly every 20 minutes in both directions. From the city train station, take the Skytrain (S-Universität stop) to the Campus Süd stop (1 stop, runs every 10 minutes).
From Dortmund Airport
By taxi to TU Dortmund University, Campus South (approx. 20 min and 30 €, see Map)
From Düsseldorf Airport
Take the city train S1 in the direction of Dortmund to the "Dortmund-Universität" station (approx. 60 min). From here, take the Skytrain in the direction of Campus South or Eichlinghofen (runs every 10 minutes and takes approx. 3 min.).
The H-Bahn is one of the hallmarks of TU Dortmund University. There are two stations on North Campus. One (“Dortmund Universität S”) is directly located at the suburban train stop, which connects the university directly with the city of Dortmund and the rest of the Ruhr Area. Also from this station, there are connections to the “Technologiepark” and (via South Campus) Eichlinghofen. The other station is located at the dining hall at North Campus and offers a direct connection to South Campus every five minutes.
The facilities of TU Dortmund University are spread over two campuses, the larger Campus North and the smaller Campus South. Additionally, some areas of the university are located in the adjacent “Technologiepark”.
Site Map of TU Dortmund University (Second Page in English).